<template>
  <div> 
    <h1>当前求和为:{{$store.state.total}}</h1>
    <select v-model.number="n">
      <option value="1">1</option>
      <option value="2">2</option>
      <option value="3">3</option>
    </select>
    <button @click="increment">+</button>
    <button @click="decrement">-</button>
    <button @click="incrementOdd">当前求和为奇数再加</button>
    <button @click="incrementWait">等一等再加</button>
  </div>
</template>

<script>
  export default {
    name:'Count', 
    data(){
      return { 
        n:1, // 用户选择的数据 
      }
    },
    methods: {
      increment(){ 
        this.$store.commit('ADD', this.n)
      },
      decrement(){ 
        this.$store.commit('SUB', this.n)
      },
      incrementOdd(){ 
        this.$store.dispatch('addOdd', this.n)
      },
      incrementWait(){
        this.$store.dispatch('addWait', this.n) 
      }
    },
    mounted() {
      // console.log(this)
    },
  }
</script>
<style>
  button{
    margin-left: 10px;
  }
</style>